- Students will be able to describe the function and importance of proper pH.
Tools & Materials
- (3) starts of a single variety and approximately the same size
- (3) four inch pots
- Sulphur or peat moss (to lower pH)
- Lime or wood ash (to raise pH)
The pH of the soil is an important measure for plant production. pH stands for potential Hydrogen and is a measure of the concentration of hydrogen ions in the soil. The importance of proper pH is tied to nutrient uptake. Soil with proper pH allows nutrients to dissolve making them bioavailable to the plants. If pH is too high or low then some of the nutrients present will not be available in a form that the plants can use. So without proper pH in the soil plants will struggle to get the nutrients they need for optimal growth and production.
Create an experiment that demonstrates the impact that pH has on plant production. Using three soil samples, one with low pH, one with balanced pH, and one with high pH, transplant three seedlings of the same variety to each soil sample. Track their development over time by recording their growth habits and traits. Draw conclusions based on the pH of their soil environment.
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